KR910005318B1 - Ic card for voices and data communication - Google Patents

Abstract

An integrated voice/data communication card uses only one line for mutually communicating the voice and data signals between two computer terminals. The card comprises async./sync. signal converter (3) for converting the async. signal from a computer (1) and an async. transmitting/receiving apparatus (2) into the sync. signal, a delta modulator (8) for modulating the voice signal from a handset to the digital signal, a multiplexer (4) for multiplexing the outputs of the async/ sync signal converter and the delta modulator, the transmitting/receiving interface means, a demultiplexer (10), a framer (9), and a sync/async signal converter (3').

Description

Integrated Voice / Data Communication Card

1 is a block diagram of the present invention.

* Explanation of symbols for main parts of the drawings

3: Asynchronous / Synchronous Signal Converter 3 ': Synchronous / Asynchronous Signal Converter

4: Multiplexer 5, 5 ': Modem / Data Service Unit (DSU)

8: delta modulator 8 ': delta demodulator

9: framer 10: demultiplex

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated voice / data communication card that enables high speed communication of non-voice and voice data in a single line in a wired data communication network between computers.

Conventionally, modems have been used as data communication between computer terminals, and when a data communication is performed while exchanging voices with a counterpart, two lines have to be used.

In addition, high-speed data communication was completed by the Korea Telecom Corporation (KTA), a high-speed line switching network (CSDN), and a non-voice data communication network using TDX-1A, which enabled 56KB / S high-speed data communication. It is a reality that cannot provide real service due to lack of data terminal equipment (DATA TERMINAL EQUIPMENT) that can accommodate high speed data of S.

The present invention has been invented to compensate for these drawbacks of the prior art. The present invention is configured to multiplex non-voice data and voice data to enable communication within a communication card and to output multiplexed high-speed data of 56 KB / S. It aims to make a computer terminal available as a high speed data terminal of 56KB / S in a high-speed line switching network and a non-voice service network using AXE-10.

The present invention is currently the most popular to achieve the above object. ratio. 9.6KB / S synchronized data and voice signals can be delta-modulated in a personal computer and a compatible computer to integrate digitalized data into a single card for communication using only one line. It was made.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

A case where voice and non-voice data communication are simultaneously performed in information communication between personal computers is described.

First, consider the case of data transmission.

The slot to be plugged into the personal computer system channel (1) is connected to the UART (2) (UNIVERSAL ASYNCHRO-NOUS RECEIVER / TRANSMITTER), which is an asynchronous transceiver for operation by the BIOS (BASIC INPUT / OUTPUT SYSTEM) of the existing personal computer. Exchange data.

The asynchronous signal output from the asynchronous transmission / reception device 2 is input to the asynchronous / synchronous signal converter 3, which uses a Motorola MC145428 chip (CHIP) to form a circuit.

The asynchronous / synchronous signal converter 3 converts the asynchronous signal into a synchronous signal and outputs 9.6 KB / S of synchronous data.

Meanwhile, the voice signal is amplified by the amplifier 7 through the handset 6 and then input to the delta modulator 8 through the TP 3040 chip, which is a PCM filter.

At this time, the HC 55564 chip is used as the delta modulator 8.

The voice signal is modulated by the delta modulator 8 and output as a digital signal of 19.2 KHz, where the voice data has a 12-bit frame.

The non-voice signal and the voice signal thus formed are inputted into the multiplexer 4 to be automated, and high-speed data of 56 KB / S is output.

The connection between the devices is in accordance with the control signal 11, wherein the interface connection is the same as that used in the RS232C or the like which is an existing data serial connector.

Next, a process of separating a signal received from a data service device (DSU) into a voice signal and a data signal, respectively, and sending the received signal to each receiver.

In the same manner as the transmitting side, the receiving side selects the modem or the data service device (DSU) in advance by the user. If the transmission is performed by the data service device 5 ', the data is transmitted from the data service device 5'. The 56KB / S data is received from the demultiplexer 10, demuxed into digital data and voice data, and sent to a framer 9.

The framer 9 finds a frame FRAME of the received data and performs error correction by a majority rule (MAJORITY RULE).

At this time, the digital data is a synchronization signal of 9.6 KB / S and is input to the synchronous / asynchronous signal converter 3 ', and the audio data is input to the delta demodulator 8' as a digital signal of 19.2 KHz.

The data received by the synchronous / asynchronous signal converter 3 'is converted into an asynchronous signal and sent to the personal computer system through the asynchronous transceiver 2, and the data received by the delta demodulator 8' converts the digital voice signal into an analog voice signal. The demodulator then passes through the amplifier 7 to the receiver.

The integrated voice / data communication card constructed by the above principle has various functions as follows.

First, voice and non-voice data communication was made possible by one line using the card of the present invention.

In other words, in communication between computers, voice communication action is added to ensure reliable information exchange.

Also a child. ratio. When the integrated voice / data communication card (IVDC) of the present invention is inserted into the input / output slot (SLOT) of the “M-computer computer” “IBM-PC / XT / AT”, the existing communication software (S / W) can be used as it is. Got kids. ratio. The M Personal computer is able to communicate with all compatible computers, and it is very economical and adds an error correction function.

Second, when the card is inserted into the IBM-PC / XT / AT terminal, it can be used as a 56KB / S high-speed data terminal in a high-speed line switching network and a non-voice service network using TDX-1A, thereby alleviating the shortage of data terminal equipment. You can.

Third, 56KB / S voice / data can be communicated by satisfying the high speed, voice and data communication functions pursued by the so-called INTEGRATED SERVICES DIGITAL NETWORKS.

In addition to the above functions, the card can be used even when an existing modem is used by inserting the interface means with the modem / data service unit (DSU) 5, 5 'in the card.

In addition, since the present invention communicates voice and non-voice data through one channel, it is irrelevant to modulation and irrespective of the data transmission rate.

As described above, the present invention provides the asynchronous / synchronous signal converter 3, the multiplexer 4, the delta modulator 8, and the framer 9 in order to enable non-voice and voice signals to be communicated in a high speed line. Integrating the demultiplexer 10 into one card enables non-voice and voice communication between computers on a single line, and enables existing personal computer terminals to be used as high-speed data terminals.

Claims (1)

In a wired data communication network between computers, asynchronous signals output from the computer 1 and the asynchronous transmission / reception apparatus (UART) 2 are changed into synchronous signals in order to enable high speed communication of non-voice / voice data within one line. A delta modulator 8, asynchronous / synchronous signal converter 3 and a delta modulator for modulating a speech signal output from the asynchronous / synchronous signal converter 3, the handset 6 and the amplifier 7 into a digital signal. A multiplexer (4) for multiplexing and outputting the digital signal outputted from 8) at high speed, directly receiving an asynchronous signal from the asynchronous transceiver (2) or receiving a digital signal from the multiplexer (4) Transmit-side interface means, modem / to selectively connect to a modem / data service unit (DSU) 5 having a selection function for transmission over a communication line. A demultiplexer 10 for receiving data signals transmitted from a receiving side interface means and a data service device (DSU), which is selectively connected to the other service device 5 ', and demultiplexing and transmitting digital data and voice signals. ), A framer (9) that finds a frame of data transmitted from the demultiplexer (10) and has an error correction function by a majority rule (MAJORITY RULE), and a voice data signal among the output signals of the framer (9). A voice / data transmitting / receiving device comprising a delta demodulator 8 'for demodulating a signal and a synchronous / asynchronous signal converter 3' for receiving a digital data signal among the output signals of the framer 9 and converting it into an asynchronous signal. Integrated voice / data communication card, characterized in that.

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